Electrode production apparatus and electrode membrane produced thereby

Abstract

The application discloses an electrode production equipment and an electrode film piece, which comprises a feeder, a belt stretching mechanism, a roller stretching mechanism, a composite roller, a detection mechanism and a turnover unwinding and winding mechanism; the feeder is used for mixing and stirring the material to make the material fibrous; a discharging nozzle on the feeder is arranged on the feeding end of the stretching channel; the thinning roller and the thinning material conveying roller are matched with each other to stretch the thick film piece into a thin film piece; the thinning material conveying roller and the composite roller are matched with each other to composite the thin film piece and the film to be compounded to form a finished film; the detection mechanism is used for detecting the alignment of the thin film piece and the film to be compounded on the finished film and detecting the thickness of the film piece; the unwinding group, the composite roller and / or the thinning material conveying roller rotate to release the film to be compounded; meanwhile, the finished film is pulled, one end of the finished film is fixed on the winding group, and the winding group is operated to wind. 2 The load capacity of a single side of the electrode film piece manufactured by using the electrode production equipment is 12 mg / cm 2， The walking path is simplified, and the automatic operation can be realized by manually leading the belt once.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrode, in particular to an electrode production equipment and an electrode membrane manufactured by the same. BACKGROUND

[0002] The dry production process of electrode material is a key link in battery manufacturing, and its efficiency and quality directly affect the overall performance of the battery. However, the existing dry process is complex, which not only increases the production cost, but also limits the production efficiency and the possibility of large-scale production.

[0003] The traditional dry process includes multiple steps such as mixing, stirring, banburying, granulating, feeding, film forming, calendering, trimming and compounding. This series of continuous steps requires precise control and coordination to ensure the quality of the final product. For example, simplifying the operation process of the above steps and reducing the walking path of the electrode membrane can help improve the production efficiency of the electrode membrane. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides an electrode production equipment capable of simplifying the dry electrode production steps and an electrode membrane manufactured by the same.

[0005] The first technical solution adopted by the present application to solve its technical problems is:

[0006] An electrode production equipment, comprising: a feeding machine, a belt calendering mechanism, a roller calendering mechanism, a compounding roller, a detection mechanism and a turnover take-up and pay-off mechanism;

[0007] The feeding machine is used to mix and stir the material evenly to make the material fibrous; wherein the feeding machine is provided with a discharge nozzle;

[0008] The belt calendering mechanism is used to calender the material into a thick membrane, and the belt calendering mechanism comprises a calendering channel, and the discharge nozzle is arranged at the feeding end of the calendering channel;

[0009] The roller calendering mechanism comprises a thinning roller and a thinning material transfer roller adjacent to the thinning roller, one side of the thinning material transfer roller is rotatably provided with the compounding roller, and the thinning roller and the thinning material transfer roller cooperate with each other to calender the thick membrane into a thin membrane, and the thin membrane is transferred to the space between the thinning material transfer roller and the compounding roller by adhering to the thinning material transfer roller; the thinning material transfer roller and the compounding roller cooperate with each other to compound the thin membrane and the to-be-compounded membrane to form a finished product membrane;

[0010] The detection mechanism is used to detect the alignment of the thin membrane and the to-be-compounded membrane on the finished product membrane and the thickness of the membrane;

[0011] The flip unwinding and winding mechanism is provided with a winding group and a winding-off group; the to-be-combined film on the winding-off group is pulled to the thinning conveying roller and the combining roller, and the winding-off group, the combining roller and / or the thinning conveying roller rotates to unwind the to-be-combined film; at the same time, the finished film is pulled, one end of the finished film is fixed on the winding group, and the winding group operates to wind up.

[0012] An electrode film piece prepared by the electrode production device, the load of a single side of the electrode film piece is 12mg / cm 2 -24mg / cm 2 .

[0013] The beneficial effects of the present application are:

[0014] When the device is used, the material is manually fed into the feeder, and then the material is pressed into thick film pieces by the belt pressing mechanism, the thick film pieces are pulled into the roller pressing mechanism, the thick film pieces are pressed into thin film pieces by the roller pressing mechanism, and under the rotation of the thinning conveying roller, the thin film pieces automatically enter between the thinning conveying roller and the combining roller; the to-be-combined film on the winding-off group is pulled to the thinning conveying roller and the combining roller, after the thin film pieces and the to-be-combined film are combined to form the finished film, the finished film is pulled to the winding group, and the winding operation is completed; the device simplifies the belt path, and only needs to manually guide the belt once, so that the device can automatically run, and only one person is needed to operate the whole line to complete the operation; the problem of repeated manual guiding of the belt is solved.

[0015] Moreover, after the material is fed into the feeder, the material does not need to be manually mixed and granulated, the load of a single side of the electrode film piece manufactured is 12mg / cm 2 -24mg / cm 2 , which meets the manufacturing standard, reduces the process steps, and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the drawings and examples.

[0017] Figure 1 is a structural schematic view of an electrode production device;

[0018] Figure 2 is a sectional view of a roller pressing mechanism, a combining roller and an integrated frame;

[0019] Figure 3 is a three-dimensional structural schematic view of a detection mechanism and a flip unwinding and winding mechanism;

[0020] Figure 4 is a rear view of a belt pressing mechanism;

[0021] Figure 5 is a perspective view of a belt pressing mechanism;

[0022] Figure 6 It is one of the cross-sectional views of the rolling mechanism;

[0023] Figure 7 This is the second sectional view of the device with the rolling mechanism;

[0024] Figure 8 This is a structural diagram of the upper ultrasound position detection group / lower ultrasound position detection group;

[0025] Figure 9 This is a structural diagram of a single-stage cutting component;

[0026] Figure 10 This is one of the structural schematic diagrams of a partial flipping and unwinding mechanism;

[0027] Figure 11 This is the second schematic diagram of the partial flipping and unwinding mechanism. Detailed Implementation

[0028] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0029] Reference Figure 1 , Figure 4 An electrode production device includes: a feeder 1, a belt rolling mechanism 2, a roller rolling mechanism 3, a composite roller 4, a detection mechanism 5, and a turning and unwinding mechanism 6. The feeder 1 is used to knead and mix materials to induce fiberization. The feeder 1 is equipped with a discharge nozzle 11. The belt rolling mechanism 2 is used to roll the material into a thick film. By applying surface pressure to the material, the uniformity and tension of the thick film are effectively improved, preventing material breakage. The belt rolling mechanism 2 includes a rolling channel 21, and the discharge nozzle 11 is located at the feed end of the rolling channel 21. This reduces the material transfer steps and the probability of contamination during the transfer process.

[0030] Reference Figure 2, the roller stretching mechanism 3 includes a thinning roller 31 and a thinning conveying roller 32 adjacent to the thinning roller 31, and the composite roller 4 is rotatably arranged on one side of the thinning conveying roller 32; the thinning roller 31 and the thinning conveying roller 32 cooperate with each other to stretch the thick film sheet into a thin film sheet; the thin film sheet is transferred to the space between the thinning conveying roller 32 and the composite roller 4, so that the film sheet is not broken due to excessive tension; the thinning conveying roller 32 and the composite roller 4 cooperate with each other to composite the thin film sheet and the film to be compounded to form a finished film; the detection mechanism 5 is used to detect the alignment of the thin film sheet and the film to be compounded on the finished film and the thickness of the finished film, so as to ensure the consistency of the thickness of the finished film;

[0031] Referring to Figure 2 、 Figure 3 , the reversing unwinding and winding mechanism 6 is provided with a winding group 601 and an unwinding group 602; the film to be compounded on the unwinding group 602 is manually pulled to the space between the thinning conveying roller 32 and the composite roller 4, and the unwinding group 602, the composite roller 4 and / or the thinning conveying roller 32 are rotated to unwind the film to be compounded; at the same time, the finished film is manually pulled, one end of the finished film is fixed on the winding group 601, and the winding group 601 is operated to wind.

[0032] When the device is used, the material is manually fed into the feeder 1, and then the material is stretched into a thick film sheet by the belt stretching mechanism 2, the thick film sheet is pulled into the roller stretching mechanism 3, the thick film sheet is stretched into a thin film sheet by the roller stretching mechanism 3, and under the rotation of the thinning conveying roller 32, the thin film sheet automatically enters the space between the thinning conveying roller 32 and the composite roller 4; the film to be compounded on the unwinding group 602 is manually pulled to the space between the thinning conveying roller 32 and the composite roller 4, and after the thin film sheet and the film to be compounded are compounded to form a finished film, the finished film is pulled to the winding group 601, and the winding operation is completed; the device simplifies the belt path, and only needs to manually pull the belt once, so that the device can automatically run, and only one person is needed to operate the whole line; the problem of repeated manual pulling of the belt is solved;

[0033] Referring to Figures 4 to 6 In one embodiment, the belt stretching mechanism 2 includes an upper steel belt 22 arranged above the stretching channel 21, a lower steel belt 23 arranged below the stretching channel 21, a pressing member 24, an upper rotating roller 25 and a lower rotating roller 26; the upper rotating roller 25 is in rolling contact with the upper steel belt 22; and the lower rotating roller 26 is in rolling contact with the lower steel belt 23;

[0034] The pressure applying member 24 is at least two, and is arranged axially along the upper rotating roller 25, and is used to apply pressure to the axial end of the upper rotating roller 25, and the pressure is transmitted to the two side edges of the upper steel belt 22 through the axial end of the upper rotating roller 25, and the material is pressed and uniformly applied to the material, and the thickness consistency of the thick film sheet is ensured.

[0035] The pressure P applied by the pressure applying member 24 to the upper rotating roller 25 ranges from 0 to 9900N. Within this range, the greater the applied pressure, the more closely the electrode material can be combined, and the functional and structural strength of the thick film sheet is considered; if the pressure exceeds this range, the material will be excessively compacted, which will damage the structural strength of the thick film sheet, and the film sheet will be easily deformed or cracked. Specifically, the adjustment accuracy of the pressure applying member 24 is 4905N, so as to accurately adjust the pressure according to different material ratios.

[0036] More specifically, the pressure applying member 24 is a hydraulic oil cylinder.

[0037] Specifically, the height of the pressure extending channel 21 gradually decreases from the feeding end to the discharging end, which is beneficial to gradually thin the thick film sheet and prevent the film sheet from being brittle and hard, so as to achieve a better one-time film thickness limit.

[0038] The belt pressure extending mechanism 2 includes a belt pressure extending frame 201 which is open at both ends; the belt pressure extending frame 201 includes a first beam 245, a second beam 244, a first connecting column 243, a second connecting column 241, a lower surface 242, a first supporting column 269, a second supporting column 268, a third supporting column 267, a fourth supporting column 264, a fifth supporting column 265, a sixth supporting column 266, a fixed seat 27, a first connecting block 281, a second connecting block 282, a third connecting block 283, a fourth connecting block 284, a fifth connecting block 285, a sixth connecting block 286, a front lifting lug 287 and a rear lifting lug 288.

[0039] The first beam 245 and the second beam 244 are parallel, and the first connecting column 243 and the second connecting column 241 are parallel to each other; the first beam 245 and the second beam 244 are vertically connected to the first connecting column 243 and the second connecting column 241 on the same horizontal plane; that is, the first beam 245, the second beam 244, the first connecting column 243 and the second connecting column 241 are located on the same horizontal plane.

[0040] The first connecting column 243 and the second connecting column 241 are both provided with the front lifting lug 287 and the rear lifting lug 288;

[0041] The upper rotating roller 25 and the lower rotating roller 26 are installed in the belt pressure extending frame 201;

[0042] The upper steel belt 22 is sleeved outside the upper rotating roller 25 and rotates around the first connecting column 243 and the second connecting column 241;

[0043] The front lifting lug 287 and the rear lifting lug 288 are arranged on both sides of the upper steel belt 22;

[0044] The lower steel belt 23 is sleeved outside the lower rotating roller 26 and rotates around the lower surface 242;

[0045] The first support column 269 connects the first beam 245 and the first connecting column 243; the second support column 268 connects the first beam 245 and the second connecting column 241; the first connecting block 281 is detachably connected to one end of the first support column 269 away from the first connecting column 243, and the second connecting block 282 is detachably connected to one end of the second support column 268 away from the first connecting column 243;

[0046] The other end of the first connecting block 281 is detachably connected to the third support column 267, one end of the third support column 267 is fixedly connected to the lower surface 242; the other end of the second connecting block 282 is detachably connected to the fourth support column 264, one end of the fourth support column 264 is fixedly connected to the lower surface 242;

[0047] Referring to Figure 4 , one end of the fifth support column 265 is fixedly connected to the second beam 244 and the first connecting column 243, and the other end is fixedly connected to the lower surface 242; one end of the sixth support column 266 is fixedly connected to the second beam 244 and the second connecting column 241, and the other end is fixedly connected to the lower surface 242;

[0048] Referring to Figure 5 , the third connecting block 283 is arranged directly below the third support column 267, one end of the third connecting block 283 is detachably connected to the lower surface 242, and the other end is detachably connected to the fixed seat 27; the fourth connecting block 284 is arranged directly below the fourth support column 264, one end of the fourth connecting block 284 is detachably connected to the lower surface 242, and the other end is detachably connected to the fixed seat 27;

[0049] The fifth connecting block 285 is arranged directly below the fifth support column 265, one end of the fifth connecting block 285 is fixedly connected to the lower surface 242, and the other end is fixedly connected to the fixed seat 27; the sixth connecting block 286 is arranged directly below the sixth support column 266, one end of the sixth connecting block 286 is fixedly connected to the lower surface 242, and the other end is fixedly connected to the fixed seat 27;

[0050] The length sum of the first support column 269, the third support column 267 and the first connecting block 281 after splicing is equal to the length of the fifth support column 265; the length sum of the second support column 268, the fourth support column 264 and the second connecting block 282 after splicing is equal to the length of the sixth support column 266.

[0051] The existing double steel belt is installed by entering a circle of the belt stretching press frame 201 and then welding the steel belt into a whole circle by using a welding gun. The maintenance time of this method is too long and often exceeds 24 hours. Meanwhile, the personnel needs to have high welding ability. Meanwhile, on-site welding will cause step difference and weld at the welding position, affecting the thickness uniformity of the stretched film. In the installation of the upper steel belt 22 in the embodiment, the following steps can be taken:

[0052] S1.1, release the fixing between the first connecting block 281 and the first support column 269 and the third support column 267, release the fixing between the second connecting block 282 and the third support column 267 and the fourth support column 264;

[0053] S1.2, hoist the front lifting lug 287 and the rear lifting lug 288, and apply an upward force to the belt stretching press frame 201;

[0054] S1.3, take out the first connecting block 281 and the second connecting block 282;

[0055] S1.4, release the hoisting of the front lifting lug 287, and only hoist the rear lifting lug 288;

[0056] S1.5, wrap the upper steel belt 22 around the first support column 269 and the second support column 268, and put the upper steel belt 22 into the belt stretching press frame 201;

[0057] S1.6, install the first connecting block 281 and the second connecting block 282 back;

[0058] S1.7, release the fixing of the rear lifting lug 288.

[0059] When installing the lower steel belt 23, the following steps can be taken:

[0060] S2.1, release the fixing between the first connecting block 281 and the first support column 269 and the third support column 267, release the fixing between the second connecting block 282 and the third support column 267 and the fourth support column 264, release the fixing between the third connecting block 283 and the lower surface 242 and the fixing seat 27, and release the fixing between the fourth connecting block 284 and the lower surface 242 and the fixing seat 27;

[0061] S2.2, hoist the front lifting lug 287 and the rear lifting lug 288, exert an upward force on the strip drawing press frame 201, and fix the horizontal height of the lower surface 242 of the forklift;

[0062] S2.3, remove the first connecting block 281, the second connecting block 282, the third connecting block 283, and the fourth connecting block 284;

[0063] S2.4, put the upper steel strip 22 into the strip drawing press frame 201 around the lower surface 242, the third support column 267, and the fourth support column 264;

[0064] S2.5, install the first connecting block 281, the second connecting block 282, the third connecting block 283, and the fourth connecting block 284.

[0065] It can be seen that in this process, the upper steel strip 22 and the lower steel strip 23 can always maintain structural integrity and will not cause any damage to the upper steel strip 22 and the lower steel strip 23. The installation is simple, the operability is strong, and the work efficiency can be significantly improved.

[0066] Specifically, the upper steel strip 22 and the lower steel strip 23 will be worn during the drawing process with the positive and negative electrode materials, causing ordinary steel strips to mix worn particles into the positive and negative electrode materials, which can be clearly seen when the particles are mixed into the particles. Therefore, to solve the wear problem, the upper steel strip 22 and the lower steel strip 23 in the embodiment use high-strength 630 stainless steel strips as materials, which are high-performance and high-wear materials, which can effectively reduce the mixing of worn materials into the positive and negative electrode materials, greatly improving the product qualification rate.

[0067] Specifically, the first beam 245 is detachably arranged between the first connecting column 243 and the second connecting column 241. After removing the first connecting column 243, the upper rotating roller 25 can be removed from the strip drawing press frame 201.

[0068] In an embodiment, the fixing seat 27 is provided with a carrying groove 271. The carrying groove 271 can be used as a forklift position or a lifting position, which facilitates the movement of the strip drawing press mechanism 2.

[0069] In an embodiment, the distance between the upper steel strip 22 and the lower steel strip 23 on the drawing channel 21 gradually decreases from the feeding end to the discharging end. The upper steel strip 22 and the lower steel strip 23 on both sides cooperate to gradually thin the membrane, which can improve the uniformity of the membrane and improve the tension of the membrane to prevent the membrane from being broken;

[0070] Referring to Figure 4 Specifically, the upper rotating roller 25 includes side-by-side first upper rotating roller groups 251, second upper rotating roller groups 252, and third upper rotating roller groups 253;

[0071] The lower rotating roller 26 comprises a first lower rotating roller group 261 arranged below the first upper rotating roller group 251, a second lower rotating roller group 262 arranged below the second upper rotating roller group 252, and a third lower rotating roller group 263 arranged below the third upper rotating roller group 253.

[0072] With the gradual reduction of the calendering channel 21, the width of the film gradually increases, in order to avoid the film being squeezed in the calendering mechanism 2, the width of the first upper rotating roller group 251, the second upper rotating roller group 252 and the third upper rotating roller group 253 gradually increases along the direction from the feeding end to the discharging end; the width of the first lower rotating roller group 261, the second lower rotating roller group 262 and the third lower rotating roller group 263 gradually increases.

[0073] With reference to Figure 5 Specifically, the first connecting block 281, the second connecting block 282, the third connecting block 283, the fourth connecting block 284, the fifth connecting block 285 and the sixth connecting block 286 have the same structure, each comprising an upper plane 291, a lower plane 292, and a connecting platform 293 arranged between the upper plane 291 and the lower plane 292;

[0074] The cross-sectional area of the connecting platform 293 is smaller than the cross-sectional area of the upper plane 291 and the lower plane 292; in this way, there is sufficient operation space at the upper and lower ends of the connecting platform 293;

[0075] Taking the connecting mode of the first connecting block 281 as an example, the upper plane 291 is detachably connected with the first supporting column 269, and the lower plane 292 is detachably connected with the third supporting column 267.

[0076] The side of the upper plane 291 facing the lower plane 292 is detachably provided with a screw detachably connected with the first supporting column 269.

[0077] The side of the lower plane 292 facing the upper plane 291 is detachably provided with a screw detachably connected with the second supporting column 268.

[0078] Specifically, the calendering mechanism 2 further comprises an upper heating group 273 arranged on one side of the upper steel belt 22 and a lower heating group 272 arranged on one side of the lower steel belt 23.

[0079] The upper heating group 273 and the lower heating group 272 jointly heat the material in the calendering channel 21, and the material is simultaneously calendered and heated, which can reduce the viscosity of the material, activate the adhesive in the material, and make the material more easily calendered into a film with uniform thickness.

[0080] With reference to Figure 4The upper heating group 273 directly heats the upper steel belt 22, and the upper steel belt 22 transmits heat to the material in the elongation channel 21; the lower heating group 272 directly heats the lower steel belt 23, and the lower steel belt 23 transmits heat to the material in the elongation channel 21;

[0081] The heating temperature of the upper heating group 273 and the lower heating group 272 is 20°C-300°C, which can ensure that the material has moderate fluidity, so that the material is not excessively softened, the activity of each component in the material is ensured, and the quality of the finished product is ensured; and the roller elongation mechanism 3 is arranged adjacent to the belt elongation mechanism 2, if the material is excessively softened, the thick film formed by elongation has a high temperature when flowing out of the belt elongation mechanism 2, which is not conducive to manual guidance, and the material is easy to stick to the roller elongation mechanism 3, the material is cooled in the roller elongation mechanism 3, which can cause the surface of the thick film formed by elongation to be uneven, and even the surface is damaged; the temperature regulation accuracy is ≤±1°C, the temperature is accurately controlled, which is helpful to form an ideal film hole structure, so as to optimize the diffusion path of lithium ions and the charge-discharge performance of the battery.

[0082] With reference to Figure 4 Specifically, from the rear perspective view of the belt elongation mechanism 2, the upper heating group 273 includes a first upper heater 311, a second upper heater 312, a third upper heater 313, and a fourth upper heater 314; the lower heating group 272 includes a first lower heater 321, a second lower heater 322, a third lower heater 323, and a fourth lower heater 324;

[0083] The first upper heater 311 is fixedly arranged on the right side of the first upper rotating roller group 251; and the first lower heater 321 is fixedly arranged on the right side of the first lower rotating roller group 261.

[0084] One end of the second upper heater 312 is fixed to the left side of the first upper rotating roller group 251, and the other end is fixed to the right side of the second upper rotating roller group 252; one end of the second lower heater 322 is fixed to the left side of the first lower rotating roller group 261, and the other end is fixed to the right side of the second lower rotating roller group 262.

[0085] One end of the third upper heater 313 is fixed to the left side of the second upper rotating roller group 252, and the other end is fixed to the right side of the third upper rotating roller group 253; one end of the third lower heater 323 is fixed to the left side of the second lower rotating roller group 262, and the other end is fixed to the right side of the third lower rotating roller group 263.

[0086] The fourth upper heater 314 is fixed to the left side of the third upper rotating roller set 253; the fourth lower heater 324 is fixed to the left side of the third lower rotating roller set 263. Each heater is continuously arranged between each roller set, which helps to keep the diaphragm continuously heated, prevent the diaphragm from breaking or cracking during the production process, and improve the overall stability and consistency of the product.

[0087] Specifically, the first upper heater 311, the second upper heater 312, the third upper heater 313, the fourth upper heater 314, the first lower heater 321, the second lower heater 322, the third lower heater 323, and the fourth lower heater 324 are all infrared heaters.

[0088] Refer to Figure 7 , in an embodiment, an upper cover plate 344 is provided on the outer side of the belt stretching and pressing machine frame 201 and on one side of the upper rotating roller 25;

[0089] A front upper deviation correction drive 331, a rear upper deviation correction drive 332, an upper fixing plate 333 inclinedly installed on the upper cover plate 344, a front upper slide rail (not shown in the figure) and a rear upper slide rail (not shown in the figure) vertically installed on the upper fixing plate 333 are installed on the upper cover plate 344; a front upper slider (not shown in the figure) is slidably arranged in the front upper slide rail, and a rear upper slider (not shown in the figure) is slidably arranged in the rear upper slide rail; an upper deviation correction roller 334 is rotatably connected between the front upper slider and the rear upper slider, and the upper deviation correction roller 334 is in rolling contact with the upper steel belt 22;

[0090] The output end of the front upper deviation correction drive 331 passes through the upper fixing plate 333 and is fixedly connected to the front upper slider, and the front upper deviation correction drive 331 is used to drive the front upper slider to slide on the front upper slide rail;

[0091] The output end of the rear upper deviation correction drive 332 passes through the upper fixing plate 333 and is fixedly connected to the rear upper slider, and the rear upper deviation correction drive 332 is used to drive the rear upper slider to slide on the rear upper slide rail;

[0092] Refer to Figure 7 , the second beam 244 is provided with an upper ultrasonic position detection group 335, and the upper ultrasonic position detection group 335 is communicatively connected to the front upper deviation correction drive 331 and the rear upper deviation correction drive 332;

[0093] Refer to Figure 8 , the upper ultrasonic position detection group includes an upper fixing frame 336 and a first position adjustment group 337 for adjusting the upper fixing frame 336. The upper fixing frame 336 is in an inverted U shape, and long-strip upper ultrasonic detectors 338 are provided at both relatively arranged ends of the upper fixing frame 336;

[0094] The first position adjusting group 337 is specifically an L-shaped bracket. The position of the L-shaped bracket is selected by a screw, so as to adjust the position of the upper ultrasonic detector 338, so as to adapt to the upper steel belt 22 with different widths;

[0095] The edge of the upper steel belt 22 is located between the two upper ultrasonic detectors 338.

[0096] When the upper ultrasonic position detection group 335 detects that the upper steel belt 22 deviates, the rear upper deviation correction drive 332 or the front upper deviation correction drive 331 indirectly drives the upper deviation correction roller 334 to swing at both ends, so as to prevent the upper steel belt 22 from deviating, and make the upper steel belt 22 always keep in the middle of the upper deviation correction roller 334.

[0097] In an embodiment, a lower cover plate 339 is arranged outside the belt stretching press frame 201 and on one side of the lower rotating roller 26;

[0098] The lower cover plate 339 is provided with a front lower deviation correction drive (not shown in the figure), a rear lower deviation correction drive (not shown in the figure), a lower fixed plate (not shown in the figure) which is obliquely arranged on the lower cover plate 339, a front lower sliding rail (not shown in the figure) which is vertically arranged on the lower fixed plate, and a rear lower sliding rail (not shown in the figure); the front lower sliding rail is provided with a front lower sliding block (not shown in the figure) which slides in the front lower sliding rail, and the rear lower sliding rail is provided with a rear lower sliding block (not shown in the figure) which slides in the rear lower sliding rail; the front lower sliding block and the rear lower sliding rail are rotationally connected with a lower deviation correction roller (not shown in the figure), and the lower deviation correction roller is in rolling contact with the lower steel belt 23.

[0099] The extension directions of the front lower deviation correction drive and the rear lower deviation correction drive are arranged towards the lower surface 242;

[0100] The output end of the front lower deviation correction drive penetrates through the lower fixed plate and is fixedly connected with the front lower sliding block. The front lower deviation correction drive is used to drive the front lower sliding block to slide on the front lower sliding rail.

[0101] The output end of the rear lower deviation correction drive penetrates through the lower fixed plate and is fixedly connected with the rear lower sliding block. The rear lower deviation correction drive is used to drive the rear lower sliding block to slide on the rear lower sliding rail.

[0102] The fixed seat 27 is provided with a lower ultrasonic position detection group 340 which is in communication connection with the front lower deviation correction drive and the rear lower deviation correction drive.

[0103] The lower ultrasonic position detection group 340 comprises a lower fixed frame 341 and a second position adjustment group 342 for adjusting the lower fixed frame 341, the lower fixed frame 341 is in the shape of "Fang", and a long strip-shaped lower ultrasonic detector 343 is arranged on each of the two ends of the lower fixed frame 341;

[0104] When the lower ultrasonic detector 343 detects that the lower steel belt 23 deviates, the rear lower deviation correction drive or the front lower deviation correction drive indirectly drives the lower deviation correction roller to swing at both ends, thereby preventing the lower steel belt 23 from deviating, so that the lower steel belt 23 always remains in the middle of the lower deviation correction roller;

[0105] The edge of the lower steel belt 23 is located between the two lower ultrasonic detectors 343.

[0106] The lower surface 242 and above the lower ultrasonic detector 343 are provided with an opening (not shown in the figure); because the position between the lower surface 242 and the fixed seat 27 is narrow, the opening is provided, so that there is enough space for adjusting the position of the lower ultrasonic detector 343.

[0107] The existing steel belt basically uses the method of detecting and adjusting the roller to correct the deviation of the steel belt, but this method is easy to stretch the two sides of the steel belt when used, resulting in the steel belt becoming flat in the middle of the two edges. This method reduces the uniformity requirement and speeds up the steel belt replacement and maintenance time.

[0108] Reference Figure 2 In an embodiment, a unification frame 7 is further included, the roller stretching mechanism 3 and the composite roller 4 are arranged on the unification frame 7, thereby reducing the length of the path of the belt; the roller stretching mechanism 3 further comprises a back roller 33;

[0109] The composite roller 4 is adjacent to the thinning conveying roller 32, and in the process of secondary thinning, the composite roller 4 can be used as a support when the thinning conveying roller 32 is deformed. Similarly, the back roller 33 is adjacent to the thinning roller 31, and the back roller 33 can be used as a support for the thinning roller 31 to reduce the deformation of the thinning roller 31 and avoid the uneven thickness of the stretched film;

[0110] The axes of the back roller 33, the thinning roller 31, the thinning conveying roller 32 and the composite roller 4 are in the same horizontal plane;

[0111] The integrated frame 7 is provided with a first servo pressure cylinder 71 directly pressing the back roller 33 and a second servo pressure cylinder 72 directly pressing the composite roller 4, the pressing direction of the first servo pressure cylinder 71 is towards the composite roller 4, the pressing direction of the second servo pressure cylinder 72 is towards the back roller 33, the first servo pressure cylinder 71 or the second servo pressure cylinder 72 can be extended or retracted to simultaneously adjust the thickness of the thinned film and the bonding strength of the film to the film to be compounded; the first servo pressure cylinder 71 comprises a first cylinder pressure sensor and a first actuator, and the second servo pressure cylinder 72 comprises a second cylinder pressure sensor and a second actuator;

[0112] The pressing directions of the first servo pressure cylinder 71 and the second servo pressure cylinder 72 are oppositely arranged;

[0113] The detection mechanism 5 is provided with a thickness gauge, which is used to identify the film thickness and the film width and send the film thickness signal;

[0114] The error of the thickness gauge identification is ≤±1.0%, and the film thickness density detected by the thickness gauge can reach ≤±1.5%;

[0115] The controller is further connected with the thickness gauge, the first servo pressure cylinder 71 and the second servo pressure cylinder 72;

[0116] The first cylinder pressure sensor and the second cylinder pressure sensor are used to transmit the signal pressure value to the controller;

[0117] The controller can be used to receive the film thickness signal transmitted by the thickness gauge, receive the first pressure signal transmitted by the first cylinder pressure sensor, receive the second pressure signal transmitted by the second cylinder pressure sensor, receive the preset film thickness signal, compare the preset film thickness signal with the film thickness signal, calculate the preset first pressure signal and the preset second pressure signal according to the preset film thickness signal, calculate the difference value between the preset first pressure signal and the first pressure signal, calculate the difference signal between the preset second pressure signal and the second pressure signal, and send the difference signal to the first actuator and the second actuator;

[0118] The first actuator and the second actuator are used to receive the difference signal sent by the controller and drive the first servo pressure cylinder 71 and the second servo pressure cylinder 72 to pressurize, so as to realize real-time monitoring and automatic control of the film thickness.

[0119] Specifically, the roll diameter size relationship of the back roller 33, the thinning conveying roller 32, the thinning roller 31 and the composite roller 4 satisfies: thinning conveying roller 32 = composite roller 4 > back roller 33 > thinning roller 31; the radii of the thinning roller 31 and the thinning conveying roller 32 are different, in the thinning process, different linear velocities are generated on both sides of the thick film sheet, the moving speed of the thick film sheet on one side of the thinning roller 31 is greater than that on one side of the thinning conveying roller 32, which helps to thin the thick film sheet at variable speed, and further shearing force can be applied to the thick film sheet to promote its fibrillation and improve the mechanical strength of the thin film.

[0120] Referring to Figure 2 In an embodiment, a first cutting assembly 81 is arranged between the tape stretching mechanism 2 and the roller stretching mechanism 3, and is used to trim the two side edges of the thick film sheet.

[0121] The thinning conveying roller 32 is provided with a second cutting assembly 82 on one side, and the second cutting assembly 82 is used to trim the two side edges of the thin film sheet.

[0122] The first cutting assembly 81 is used to cut off the two side edges of the thick film sheet, so that the thick film sheet forms a flat film edge, avoiding that the uneven edges of the thick film sheet lead to cracking of the thick film sheet in the tape walking process; and the cutting of the first cutting assembly 81 can avoid that the width of the thick film sheet exceeds the length of the roller shaft of the thinning roller 31, leading to different film thicknesses after thinning; after the thick film sheet is stretched by the thinning roller 31 and the thinning conveying roller 32, the film width becomes longer, and the second cutting assembly 82 is used to trim the two sides of the thin film to avoid that the thin film exceeds the length of the roller shaft of the composite roller 4 and the thinning conveying roller 32, and the width of the thin film is greater than the width of the film to be compounded; when the film to be compounded is a single electrode film, the width of the film to be compounded on both sides of the current collector of the double electrode film formed after the single electrode film is compounded with the film sheet is greater than the width of the current collector, which leads to short circuit of the electrode and failure of the double electrode film.

[0123] Specifically, the first visual identification mechanism 513 is arranged on one side of the part where the thinning conveying roller 32 rolls in contact with the thin film sheet, and is used to detect the flatness of the thin film sheet after being trimmed by the second cutting assembly 82.

[0124] Referring to Figure 9 More specifically, the second cutting assembly 82 includes a rotating hand wheel 834, a lead screw 833, a cutting upper sliding rail 832, a cutting lower sliding rail 831, a left lead screw nut 825, a right lead screw nut 826, a left sliding seat 827, a right sliding seat 828, a left cutter 829, a right cutter 830, a left material receiving inclined plate 821, a right material receiving inclined plate 822, a left cutter driving member 823 and a right cutter driving member 824.

[0125] The cutting upper sliding rail 832 is located above the lead screw 833 and is arranged in parallel with the lead screw 833.

[0126] The cutting lower slide rail 831 is located below the screw rod 833 and is arranged in parallel with the screw rod 833;

[0127] The rotating hand wheel 834 is fixedly connected with the screw rod 833;

[0128] The screw rod 833 is provided with left threads and right threads on both sides thereof;

[0129] The left screw rod nut 825 is in transmission connection with the left threads, and the right screw rod nut 826 is in transmission connection with the right threads;

[0130] The left slide base 827 is fixed on the left screw rod nut 825 and is arranged in sliding manner on the cutting upper slide rail 832 and the cutting lower slide rail 831;

[0131] The right slide base 828 is fixed on the right screw rod nut 826 and is arranged in sliding manner on the cutting upper slide rail 832 and the cutting lower slide rail 831;

[0132] The left material receiving inclined plate 821 is fixed at one end on the left slide base 827 and is arranged on the side of the left cutter 829 away from the right cutter 830 and above the center of the left cutter 829, and the left material receiving inclined plate 821 is arranged in an inclined direction towards the bottom of the electrode composite device;

[0133] The right material receiving inclined plate 822 is fixed at one end on the right slide base 828 and is arranged on the side of the right cutter 830 away from the left cutter 829 and above the center of the right cutter 830, and the left material receiving inclined plate 821 is arranged in an inclined direction towards the bottom of the electrode composite device;

[0134] The fixed end of the left cutter driving member 823 is arranged on the left slide base 827, and the driving member of the left cutter driving member 823 is connected with the output end of the left cutter 829;

[0135] The fixed end of the right cutter driving member 824 is arranged on the right slide base 828, and the driving member of the right cutter driving member 824 is connected with the output end of the right cutter 830.

[0136] Taking cutting of a single-sided electrode film as an example, the working principle of the secondary cutting assembly 82 is as follows:

[0137] The rotating hand wheel 834 is rotated to drive the screw rod 833 to rotate in the same direction, the left screw rod nut 825 and the right screw rod nut 826 are synchronously and reversely slid, the relative distance between the left cutter 829 and the right cutter 830 is increased, the left cutter 829 and the right cutter 830 are adjusted to appropriate positions, the left cutter driving member 823 and the right cutter driving member 824 are started, the left cutter 829 and the right cutter 830 cut the single-sided electrode film, the left film waste edge and the right film waste edge cut down are respectively slid along the left material receiving inclined plate 821 and the right material receiving inclined plate 822 to the bottom of the roller pressing mechanism 3 under the action of gravity, and the fine cutting of the single-sided electrode film is completed.

[0138] The first visual identification mechanism 513 is arranged on the left slide seat 827 and the right slide seat 828, and the rotating rotary handle 834 drives the first visual identification mechanism 513 to move simultaneously with the left cutter 829 and the right cutter 830 to identify the flatness of the film cutting.

[0139] Referring to Figure 1 In an embodiment, the feeding machine 1 comprises an upward feeding port 12, and a feeding ladder 13 is arranged on one side of the feeding machine 1. The height of the feeding port 12 is higher than the height of the operator, and the feeding ladder 13 is used for the operator to feed into the feeding port 12.

[0140] Specifically, the detection mechanism 5 comprises a rack 501, and a winding channel 511 is arranged on the rack 501. Second visual identification mechanisms 512 are arranged on the upper and lower sides of the winding channel 511, and the visual identification mechanisms 512 are used to detect the alignment of the film and the to-be-combined film.

[0141] Referring to Figure 3 In an embodiment, the turnover winding and unwinding mechanism 6 further comprises a turnover rack 61 and a rotating disc 62, and the winding group 601 and the unwinding group 602 are arranged on the rotating disc 62. The to-be-combined film is a current collector or a single-sided electrode film. When the to-be-combined film is a current collector, the finished product film is a single-sided electrode film. When the to-be-combined film is a double-sided electrode film, the finished product film is a double-sided electrode film.

[0142] In an initial state, a current collector roll is sleeved on the unwinding group 602, the current collector roll is pulled to between the thinning conveying roller 32 and the combining roller 4, the thinning conveying roller 32 and the combining roller 4 work to combine the film and the to-be-combined film to form a single-sided electrode film. The single-sided electrode film is pulled and fixed at one end on the winding group 601, and the winding group 601 and the unwinding group 602 work simultaneously. Until the unwinding group 602 is empty, the rotating disc 62 rotates to exchange the relative positions of the winding group 601 and the unwinding group 602.

[0143] The single-sided electrode film on the winding group 601 is pulled to between the thinning conveying roller 32 and the combining roller 4, the thinning conveying roller 32 and the combining roller 4 work to combine the film and the single-sided electrode film to form a double-sided electrode film. The double-sided electrode film is pulled and fixed at one end on the unwinding group 602, and the winding group 601 and the unwinding group 602 work simultaneously to obtain a double-sided electrode film.

[0144] Both the take-up group 601 and the unwinding group 602 are mounted on the turntable 62. The turntable 62 rotates, which can quickly switch the relative positions of the unwinding group 602 and the take-up group 601. During the manufacturing of the double-sided composite film, when the take-up group 601 is full of single-sided electrode film, the turntable 62 rotates, and the take-up group 601 switches to the state of taking in the double-sided electrode film. Similarly, when the current collector on the unwinding group 602 is emptied, the turntable 62 rotates, and the unwinding group 602 switches to unwinding the single-sided electrode film.

[0145] It should be noted that the winding group 601 and the unwinding group 602 in this embodiment do not represent a fixed component. The physical components of the two can be interchanged. They mainly refer to the unwinding group 602 in the unwinding state and the winding group 601 in the winding state.

[0146] In this embodiment, a reversing frame 61 integrates a winding group 601 and an unwinding group 602. One mechanism realizes the winding and unwinding functions. That is to say, when manually guiding the belt, the belt guiding operation can be completed by moving between the composite roller 4 and the reversing winding and unwinding mechanism 6. In the prior art, the winding group 601 and the unwinding group 602 are often set as two separate mechanisms. Manual belt guiding requires back and forth between the positions of the winding group 601, the unwinding group 602 and the composite roller 4. The belt guiding distance is long and the belt guiding operation is complicated. This embodiment can shorten the belt guiding distance and simplify the belt guiding operation, further improving the production efficiency of electrode films.

[0147] Reference Figure 10 , Figure 11 As an explanation, the flipping and unwinding mechanism 6 further includes a first roller 611 and a second roller 621, and the turntable 62 includes a first turntable 612 and a second turntable 622; the first roller 611 and the second roller 621 are rotatably mounted on the first turntable 612 at one end and on the second turntable 622 at the other end.

[0148] Rotating the first turntable 612 and the second turntable 622 can adjust the position of the first roller 611 and the second roller 621 relative to the roller pressing mechanism 3.

[0149] When the first roller 611 is equipped with a current collector, the first roller 611 is in the unwinding state, which is the unwinding group 602. At this time, the second roller 621 is in the state of winding up the single-sided electrode film, which is the winding group 601.

[0150] When the first turntable 612 and the second turntable 622 rotate synchronously, and the second roller 621 is in the state of releasing the single-sided electrode film, the second roller 621 is the unwinding group 602; at this time, the first roller 611 is in the state of retracting the double-sided electrode film, which is the winding group 601.

[0151] Specifically, the first central shaft 613, the second central shaft 623, the first shaft wheel 614, the second shaft wheel 615, the third shaft wheel 624, the fourth shaft wheel 625, the first winding and unwinding driving element 616, the second winding and unwinding driving element 626, the first roller 617, the second roller 627, the first transmission chain (not shown in the figure), the second transmission chain (not shown in the figure), the first driving wheel 618, the second driving wheel 628, the third transmission chain (not shown in the figure), and the fourth transmission chain (not shown in the figure) are included.

[0152] The first central shaft 613 is arranged at the center of the first rotating disc 612 and located on the side away from the second rotating disc 622. The second central shaft 623 is arranged at the center of the second rotating disc 622 and located on the side away from the first rotating disc 612. The first shaft wheel 614 and the second shaft wheel 615 are rotatably arranged on the first central shaft 613, and the relative positions of the first shaft wheel 614 and the second shaft wheel 615 are fixed.

[0153] Referring to Figure 10 , the third shaft wheel 624 and the fourth shaft wheel 625 are rotatably arranged on the second central shaft 623, and the relative positions of the third shaft wheel 624 and the fourth shaft wheel 625 are fixed;

[0154] The first roller 617 is connected to one end of the first roller 611. The first roller 617, the first shaft wheel 614, and the second shaft wheel 615 are located on the side of the same side of the first rotating disc 612. The first transmission chain is engaged with the first roller 617 and the first shaft wheel 614. The first winding and unwinding driving element 616 is provided with the first driving wheel 618. The second transmission chain is engaged with the first driving wheel 618 and the second shaft wheel 615.

[0155] Referring to Figure 11 , the second roller 627 is connected to one end of the second roller 621. The second roller 627, the third shaft wheel 624, and the fourth shaft wheel 625 are located on the side of the same side of the second rotating disc 622. The third transmission chain is engaged with the second roller 627 and the third shaft wheel 624. The second winding and unwinding driving element 626 is provided with the second driving wheel 628. The fourth transmission chain is engaged with the second driving wheel 628 and the fourth shaft wheel 625.

[0156] In the embodiment, the control circuit board and the components of the winding thickness sensor can be arranged on the first rotating disc 612, and the electronic device is arranged to reasonably plan the circuit to avoid the disorderly arrangement of the wires on the device and affect the normal operation of the turnover winding and unwinding mechanism 6; for example, the first driving wheel 618 directly drives the first roller 617 to transmit power, and the first driving wheel 618 and the first roller 617 need to be located on the same plane, and when the first rotating disc 612 rotates, the wires on the inner surface thereof are easily entangled with the first driving wheel 618, which not only affects the rotation of the first rotating disc 612, but also causes the first driving wheel 618 to fail to engage with the first roller 617; in the embodiment, since the first shaft wheel 614 and the second shaft wheel 615 are located on the first central shaft 613, the first driving wheel 618 and the first roller 617 are located on two planes, so that the wires on the inner surface of the first rotating disc 612 are prevented from being entangled with the first driving wheel 618.

[0157] Specifically, the edge of the first rotating disc 612 is provided with a plurality of teeth, one side of the first rotating disc 612 is provided with a rotating disc driving member 630, the output end of the rotating disc driving member 630 is provided with a third driving wheel 631 engaged with the edge of the first rotating disc 612, the rotating disc driving member 630 drives the third driving wheel 631 to rotate, thereby driving the first rotating disc 612 to rotate, and since the first rotating disc 612 and the second rotating disc 622 are connected with the first roller 611 and the second roller 621, the rotation of the first rotating disc 612 can drive the second rotating disc 622 to rotate synchronously, thereby adjusting the relative positions of the first roller 611 and the second roller 621, and realizing the state switching of the first roller 611 between the winding group 601 and the unwinding group 602 and the state switching of the second roller 621 between the winding group 601 and the unwinding group 602.

[0158] An electrode membrane prepared by the electrode production device in any one of the above embodiments, the load of a single side of the electrode membrane is 12 mg / cm2-24 mg / cm2, which meets the manufacturing standards, reduces the process steps, and improves the production efficiency.

[0159] The above is a specific description of the preferred embodiment of the application, but the application is not limited to the above-mentioned embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. An electrode production apparatus characterized by comprising: The application relates to a feeding machine (1), a belt calender mechanism (2), a roller calender mechanism (3), a composite roller (4), a detection mechanism (5) and a turnover winding and unwinding mechanism (6). The feeding machine (1) is used for mixing and stirring materials to make the materials fibrous; a discharging nozzle (11) is arranged on the feeding machine (1). The belt calender mechanism (2) is used for calendering the materials into thick film pieces, and the belt calender mechanism (2) comprises a calendering channel (21), and the discharging nozzle (11) is arranged on the feeding end of the calendering channel (21). The roller calender mechanism (3) comprises a thinning roller (31) and a thinning material conveying roller (32) adjacent to the thinning roller (31), one side of the thinning material conveying roller (32) is rotationally provided with the composite roller (4), the thinning roller (31) and the thinning material conveying roller (32) are matched with each other to calender the thick film pieces into thin film pieces, the thin film pieces are transferred to the space between the thinning material conveying roller (32) and the composite roller (4) by being attached to the thinning material conveying roller (32), and the thinning material conveying roller (32) and the composite roller (4) are matched with each other to composite the thin film pieces and the to-be-composited film to form a finished film. The detection mechanism (5) is used for detecting the alignment degree of the thin film pieces and the to-be-composited film on the finished film and detecting the film thickness. The turnover winding and unwinding mechanism (6) is provided with a winding group (601) and an unwinding group (602); the to-be-composited film on the unwinding group (602) is pulled to the space between the thinning material conveying roller (32) and the composite roller (4), the unwinding group (602), the composite roller (4) and / or the thinning material conveying roller (32) are rotated to unwind the to-be-composited film; meanwhile, the finished film is pulled, one end of the finished film is fixed on the winding group (601), and the winding group (601) is operated to wind up. The belt calender mechanism (2) comprises an upper steel belt (22) arranged above the calendering channel (21), a lower steel belt (23) arranged below the calendering channel (21), a pressure applying piece (24), an upper rotating roller (25) and a lower rotating roller (26). The upper rotating roller (25) is in rolling contact with the upper steel belt (22), and the lower rotating roller (26) is in rolling contact with the lower steel belt (23). The pressure applying piece (24) is at least two and is arranged along the axial direction of the upper rotating roller (25), the pressure applying piece (24) is used for applying pressure to the axial end of the upper rotating roller (25), the pressure is transmitted to the two side edges of the upper steel belt (22) through the axial end of the upper rotating roller (25) to calender the materials; The pressure P applied by the pressure applying piece (24) to the upper rotating roller (25) ranges from 0t to 9900N. The belt calender mechanism (2) further comprises an upper heating group (273) arranged on one side of the upper steel belt (22) and a lower heating group (272) arranged on one side of the lower steel belt (23). ​ The upper heating group (273) directly heats the upper steel belt (22), and the upper steel belt (22) transmits heat to the material in the elongation channel (21); the lower heating group (272) directly heats the lower steel belt (23), and the lower steel belt (23) transmits heat to the material in the elongation channel (21); The heating temperature of the upper heating group (273) and the lower heating group (272) is 20°C-300°C, and the temperature regulation accuracy is ≤±1°C; The upper heating group (273) comprises a first upper heater (311), a second upper heater (312), a third upper heater (313), and a fourth upper heater (314); the lower heating group (272) comprises a first lower heater (321), a second lower heater (322), a third lower heater (323), and a fourth lower heater (324); and the first upper heater (311), the second upper heater (312), the third upper heater (313), the fourth upper heater (314), the first lower heater (321), the second lower heater (322), the third lower heater (323), and the fourth lower heater (324) are all infrared heaters; A first cutting assembly (81) is arranged between the belt elongation mechanism (2) and the roller elongation mechanism (3), and the first cutting assembly (81) is used to trim the two side edges of the thick film sheet; A second cutting assembly (82) is arranged on one side of the thinning conveying roller (32), and the second cutting assembly (82) is used to trim the two side edges of the thin film sheet; A first visual identification mechanism (513) is arranged on one side of the part of the thinning conveying roller (32) in rolling contact with the thin film sheet, and the first visual identification mechanism (513) is used to detect the neatness of the thin film sheet after being cut by the second cutting assembly (82).

2. The electrode production apparatus according to claim 1, characterized by: Further comprising an integrated frame (7), the roller elongation mechanism (3) and the composite roller (4) are arranged on the integrated frame (7), and the roller elongation mechanism (3) further comprises a back roller (33); The axes of the back roller (33), the thinning roller (31), the thinning conveying roller (32), and the composite roller (4) are all in the same horizontal plane; The integrated frame (7) is provided with a first servo pressure cylinder (71) directly pressing the back roller (33) and a second servo pressure cylinder (72) directly pressing the composite roller (4), the pressing direction of the first servo pressure cylinder (71) is towards the composite roller (4), and the pressing direction of the second servo pressure cylinder (72) is towards the back roller (33); the first servo pressure cylinder (71) comprises a first cylinder pressure sensor and a first actuator, and the second servo pressure cylinder (72) comprises a second cylinder pressure sensor and a second actuator; The pressing directions of the first servo pressure cylinder (71) and the second servo pressure cylinder (72) are oppositely arranged; The detection mechanism (5) is provided with a thickness gauge, and the thickness gauge is used to identify the film thickness and the film width and send a film thickness signal; Also include a controller connected with the thickness gauge, the first servo pressure cylinder (71) and the second servo pressure cylinder (72) signal; The first cylinder pressure sensor, the second cylinder pressure sensor is used to send signal pressure value to the controller; The controller can be used to receive the film thickness signal transmitted by the thickness gauge, receive the first pressure signal transmitted by the first cylinder pressure sensor, receive the second pressure signal transmitted by the second cylinder pressure sensor, receive the preset film thickness signal, compare the preset film thickness signal with the film thickness signal, calculate the preset first pressure signal, the preset second pressure signal, calculate the difference value of the preset first pressure signal and the first pressure signal, calculate the difference signal of the preset second pressure signal and the second pressure signal, and send the difference signal to the first actuator and the second actuator. The first actuator, the second actuator is used to receive the difference signal sent by the controller, and drive the first servo pressure cylinder (71) and the second servo pressure cylinder (72) to pressurize.

3. The electrode production apparatus according to claim 2, characterized by: The detection mechanism (5) comprises a rack (501), a winding channel (511) is arranged on the rack (501), and a second visual identification mechanism (512) is arranged on the upper and lower sides of the winding channel (511). The visual identification mechanism (512) is used to detect the alignment of the film and the to-be-combined film.

4. The electrode production apparatus according to claim 1, wherein: The feeding machine (1) comprises an upward feeding port (12), and one side of the feeding machine (1) is provided with a feeding ladder (13).

5. The electrode production apparatus according to claim 1, wherein: The turnover winding and unwinding mechanism (6) further comprises a turnover frame (61) and a turntable (62), and the winding group (601) and the unwinding group (602) are rotatably arranged on the turntable (62); the to-be-combined film is a current collector or a single-sided electrode film; when the to-be-combined film is a current collector, the finished film is a single-sided electrode film; when the to-be-combined film is a double-sided electrode film, the finished film is a double-sided electrode film; In the initial state, a current collector roll is sleeved on the unwinding group (602), the current collector roll is pulled to the position between the thinning conveying roller (32) and the composite roller (4), the thinning conveying roller (32) and the composite roller (4) work to combine the film and the to-be-combined film to form a single-sided electrode film; the single-sided electrode film is pulled, and one end of the single-sided electrode film is fixed on the winding group (601), and the winding group (601) and the unwinding group (602) work simultaneously; until the unwinding group (602) is empty, the turntable (62) rotates, and the relative positions of the unwinding group (602) and the winding group (601) are exchanged; The single-sided electrode film on the winding group (601) is pulled to between the thinning conveying roller (32) and the composite roller (4), and the thinning conveying roller (32) and the composite roller (4) work to composite the film sheet and the single-sided electrode film to form a double-sided electrode film; the double-sided electrode film is pulled, and one end of the double-sided electrode film is fixed on the unwinding group (602), and the winding group (601) and the unwinding group (602) work simultaneously to obtain a double-sided electrode film.

6. An electrode membrane characterized by: The electrode film sheet is produced by the electrode production apparatus according to any one of claims 1 to 5, and has a loading amount of 12 mg / cm on one side 2 -24 mg / cm 2 .

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